For the 2026 school year, there are 8 private high schools belonging to Christian Schools International (CSI) serving 3,917 students in Washington. You can also find more schools membership associations in Washington.
The top-ranked private high schools belonging to Christian Schools International (CSI) in Washington include Sunnyside Christian School, Mount Vernon Christian School, and Rainier Christian Middle and High School.
The average acceptance rate is 82%, which is lower than the Washington private high school average acceptance rate of 83%.
Top-Ranked Private High Schools Belonging to Christian Schools International (CSI) in Washington (2026)
School
Location
Quick Facts
1701 98th Ave Ne
Bellevue, WA 98004
(425) 460-3300
Bellevue, WA 98004
(425) 460-3300
Gr: 7-12 | 1,037 student Avg. class size: 17 students Sports: 8 Tuition & acceptance rate listed
Ellensburg Christian School
(Christian)
407 S Anderston St
Ellensburg, WA 98926
(509) 925-2411
Ellensburg, WA 98926
(509) 925-2411
Gr: NS-12 | 92 students Avg. class size: 12 students Tuition & acceptance rate listed
Lynden Christian School
(Christian)
417 Lyncs Dr
Lynden, WA 98264
(360) 354-5492
Lynden, WA 98264
(360) 354-5492
Gr: PK-12 | 1,210 student Sports: 9 | Extracurrculars: 6
Mount Vernon Christian School![Mount Vernon Christian School Photo]( "Mount Vernon Christian School Photo")
(Christian)
820 W Blackburn Rd
Mount Vernon, WA 98273
(360) 424-9157
Mount Vernon, WA 98273
(360) 424-9157
Gr: PK-12 | 502 students Avg. class size: 21 students Sports: 6 | Extracurrculars: 6 Tuition & acceptance rate listed
Rainier Christian Middle and High School![Rainier Christian Middle and High School Photo]( "Rainier Christian Middle and High School Photo")
(Christian)
19830 SE 328th Pl
Auburn, WA 98002
(425) 255-7273
Auburn, WA 98002
(425) 255-7273
Gr: NS-12 | 581 students Avg. class size: 15 students Sports: 9 Tuition & acceptance rate listed
2400 NE 147th Street
Seattle, WA 98155
(206) 364-7777
Seattle, WA 98155
(206) 364-7777
Gr: PK-12 | 212 students Avg. class size: 13 students Sports: 6 | Extracurrculars: 2 Tuition & acceptance rate listed
Sunnyside Christian School
(Calvinist)
1820 Sheller Road
Sunnyside, WA 98944
(509) 837-8995
Sunnyside, WA 98944
(509) 837-8995
Gr: PK-12 | 269 students Tuition & acceptance rate listed
North Whidbey Christian High School
(Christian)
675 E. Whidbey Avenue
Oak Harbor, WA 98277
(360) 675-5352
Oak Harbor, WA 98277
(360) 675-5352
Gr: 7-12 | 14 students
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